Signal-bell.



J. CHARLAND & R. A. OCONNOR.

SIGNAL BELL.

APPLICATION HL-ED SEPT. 5. 1914.

Patented Oct. 19, 1915.

2 SHEETS-SHEET I a r ATONE wmm WITNESSES, zz 2W J. CHARLAND & R. A. OCONNOR.

2 SHEETSSHEET 2.

W/T/VESSES A TTOR/VEY8 Patented Oct. 19, 1915.

JOSEPH CHARLAND AND RICHARD A. OCONNOR, OF COPPER CLIFF, ONTARIO, CANADA.

SIGNAL-BELL Lil-57,5 08.

Specification of Letters Patent.

Patented Oct. 19, 1915.

Application filed September 5, 1914. Serial No. 860,501.

King of Great Britain, and residents of Copper Clifl, in the Province of -Ontario and Dominion of Canada, have invented certain new and useful Improvements in Signal-Bells, of which the following is a specification.

Our invention relates to electric bells, and the main object thereof is to provide such a bell which will produce but one stroke on the gong for each actuation of the circuit closer; another object is to provide a clapper which consists of one section of a divided core within a magnetic coil; another object is to provide such a clapper which will immediately recede from the gong after each stroke, in order not to deaden the vibrations of the gon and further objects are to provide such bells which are simple in construction and positive in operation, which are composed of but few parts not likely to get out of order to require repair, and which are comparatively inexpensive.

Our invention is fully described in the following specification, of which the accompanying drawings form a part, in which the separate parts are designated by the same reference characters in each of the views, and in which Figure 1 is a face view of a bell constructed in accordance with our invention, with the cover removed from the box; and Fig. 2 is a section taken on the line 22 of Fig. 1.

In the drawings forming a part of this application we have shown a present preferred form of embodiment of our invention, comprising a base plate 3 having a box 4 at the lower end thereof, a vertical, centrally arranged, slot 5 in the upper portion thereof, and holes 6 for screws whereby it may be connected with a suitable support.

Passed through the slot 5 is a bolt 7 also passed through a gong 8 and held .thereon by means of a nut 9, a section of tube 10 being interposed between the gong and base to maintain the desired relationship therebetween, this arrangement of gong mounting being in order to permit the vertical adjustment thereof with respect to the box 4, regardless of the size of the gong, within certain limits. v

The box 4 is provided with a detachable 'cover 11, a water-proof gasket 12 being interposed between box and cover, and said box is also provided with a centrally arranged hole 13 in the top thereof, screwthreaded holes 14 and 14 adapted to receive sections of conduit, not shown, for electrical conductors 15 and 16 connected with a suitable source of electrical energy, 17, and a normally open switch 18, said conductors being respectively connected, within the box, with conductive strips 19 and 20 upon an jinsulating block 21 secured to the base plate '3. Also connected with the strips 19 and 20 are the ends of a suitable winding 22 of a spool 23 formed of a central tube 24, an integral lower flange 25, and an adjustable upper flange 26, said tubular portion 24 being threaded to receive said flange, and also to receive a nut 27 on the top of the box, and through the hole 13 in said box and locked thereto by means of said nut 27, a rubber or other suitable gasket 28 being interposed between the upper flange 26 and the inner surface of the top of the box.

Vertically slidable within the bore of the tubular spool portion 24 are two distinct cores 29 and 30, the former of which is of relatively short length within the portion 24 and extended thereover and provided with a downwardly directed flange 31 to render the. tube 24 dust and waterproof; the latter core 30 normally rests upon the bottom of the box 4, a very material space normally existing between the two core sections; the adjacent ends of said sections are capped with brass, preferably, in order to prevent said sections clinging together after having been brought into contact as later described, and said cores slide freely in the tube 24.

When the switch 18 is closed, an electrical circuit is completed through the coil winding 22, and the core section 30 is drawn upwardly into the tube 24, thus striking against the core section 29 which constitutes the clapper for the gong 8, said clapper not being enabled to be drawn into said tube by reason of the enlarged head thereon, but, as soon as it has been forced out of said tube to strike the gong, it is so attracted, and moves inwardly of the tube 24, thus permitting the metal of the gong to vibrate, and, because of the non-magnetic property of the brass caps on the core sections, the lower section drops to normal position as soon as the circuit is again opened, but only one stroke of the clapper on the gong results from each switch closure.

It will thus be seen that a very simple mechanism is provided and no part of which is at all likely to get out of order to require repair; the slot in the base plate 3 permits considerable latitude as to the diameter of the gong employed, and also allows of the proper adjustment of said gong with respect to its clapper; the device, as a whole, is dust and waterproof, and any suitable winding of the coil, for direct or alternating currents, may be provided, without affecting the operation of the bell.

While we have illustrated and described certainstructural details, it will be obvious that we are not limited thereto, but may make changes thereover, within the scope of the following claims, without departing from the spiritofthe'invention or sacrific- .inq its advantages.

l-Iaving fully described the invention, what we claim as new, and desire to secure by Letters Patent, is

1. A device of the class described, comprising a base plate, a gong thereon, a spool thereon provided with a magnetic coil arranged-in a normally open circuit, a relatively short core in the top of said spool provided with an enlarged head extended thereover to form a hammer, and a supplemental core in the lower part of said spool adapted to be actuated to force said hammer against said gong when said coil is energized.

2. A device of the class described, comprising a base plate, a gong thereon, a spool thereon provided with a magnetic coil arranged in a normally open circuit, a relatively short core in the top of said spool provided with an enlarged head extended thereover to form a hammer, a supplemental core in the lower part of said spool adapted to be actuated to force said hammer against said gong when said coil is energized, and a cap of non-magnetic material on each of the contiguous ends of said cores.

3. A device of the class described, comprising a base plate, a gong thereon, a spool thereon having an upwardly extended tubular member and provided with a magnetic coil arranged in a normally open electrical circuit, a relatively short core in said tubular extension provided with an enlarged head and a flange adapted to inclose said extension when said core is in normal position. and a supplemental core in the lower part of said spool adapted to be actuated to force said first named core against said gong when said coil is energized.

4. A device of the class described, comprising a base plate, a gong thereon, a spool thereon having an upwardlyextended member and provided with a magnetic coil arrangedin a normally open electrical circuit, a core in said tubular extension, means for limiting the movement thereof inwardly of said spool, and a supplemental core normally at the other end of said spool, said supplemental core being of relatively-great length and said first named core of relatively short length, whereby said supplemental core will impinge on said first named core when said coil is energized to drive the latter against said gong, and said first named core will be drawn into said spool by the magnetic attraction thereafter to insure operation of the signal in any position of. said spool;

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOSEPH CHARLAND. RICHARD A. OCONNOR.

Witnesses:

JAMES PATRICK OBYRNE, THOMAS PATRICK GANNON. 

